51
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Baxter EF, Bennett TD, Cairns AB, Brownbill NJ, Goodwin AL, Keen DA, Chater PA, Blanc F, Cheetham AK. A comparison of the amorphization of zeolitic imidazolate frameworks (ZIFs) and aluminosilicate zeolites by ball-milling. Dalton Trans 2016; 45:4258-68. [DOI: 10.1039/c5dt03477a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amorphization of zeolitic imidazolate frameworks during ball-milling is much more rapid than that of aluminosilicate zeolites.
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Affiliation(s)
- Emma F. Baxter
- Department of Materials Science and Metallurgy
- University of Cambridge
- Cambridge
- UK
| | - Thomas D. Bennett
- Department of Materials Science and Metallurgy
- University of Cambridge
- Cambridge
- UK
| | - Andrew B. Cairns
- Inorganic Chemistry Laboratory
- Department of Chemistry
- University of Oxford
- Oxford OX1 3QR
- UK
| | - Nick J. Brownbill
- Department of Chemistry and Stephenson Institute for Renewable Energy
- University of Liverpool
- Liverpool
- UK
| | - Andrew L. Goodwin
- Inorganic Chemistry Laboratory
- Department of Chemistry
- University of Oxford
- Oxford OX1 3QR
- UK
| | | | - Philip A. Chater
- Diamond Light Source Ltd
- Diamond House
- Harwell Science & Innovation Campus
- Oxfordshire, OX11 0DE
- UK
| | - Frédéric Blanc
- Department of Chemistry and Stephenson Institute for Renewable Energy
- University of Liverpool
- Liverpool
- UK
| | - Anthony K. Cheetham
- Department of Materials Science and Metallurgy
- University of Cambridge
- Cambridge
- UK
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52
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Springer S, Baburin IA, Heinemeyer T, Schiffmann JG, van Wüllen L, Leoni S, Wiebcke M. A zeolitic imidazolate framework with conformational variety: conformational polymorphs versus frameworks with static conformational disorder. CrystEngComm 2016. [DOI: 10.1039/c6ce00312e] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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53
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Hartmann M, Böhme U, Hovestadt M, Paula C. Adsorptive Separation of Olefin/Paraffin Mixtures with ZIF-4. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:12382-12389. [PMID: 26488156 DOI: 10.1021/acs.langmuir.5b02907] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The microporous zeolitic imidazolate framework ZIF-4 has been synthesized, and its ethylene/ethane and propylene/propane separation potentials have been evaluated by single-component adsorption isotherms and breakthrough experiments of the respective binary mixtures. In all experiments, a higher selectivity for the paraffin is observed that is manifested by a steeper equilibrium isotherm as well as a later breakthrough in the fixed-bed adsorber experiments. Microporous adsorbents with paraffin selectivity are rare but highly interesting for cyclic adsorption processes such as pressure-swing adsorption (PSA).
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Affiliation(s)
- Martin Hartmann
- Erlangen Catalysis Resource Center (ECRC), Friedrich-Alexander-Universität Erlangen-Nürnberg , Egerlandstr. 3, 91058 Erlangen, Germany
| | - Ulrike Böhme
- Erlangen Catalysis Resource Center (ECRC), Friedrich-Alexander-Universität Erlangen-Nürnberg , Egerlandstr. 3, 91058 Erlangen, Germany
| | - Maximilian Hovestadt
- Erlangen Catalysis Resource Center (ECRC), Friedrich-Alexander-Universität Erlangen-Nürnberg , Egerlandstr. 3, 91058 Erlangen, Germany
| | - Carolin Paula
- Erlangen Catalysis Resource Center (ECRC), Friedrich-Alexander-Universität Erlangen-Nürnberg , Egerlandstr. 3, 91058 Erlangen, Germany
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54
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Du Y, Wooler B, Nines M, Kortunov P, Paur CS, Zengel J, Weston SC, Ravikovitch PI. New High- and Low-Temperature Phase Changes of ZIF-7: Elucidation and Prediction of the Thermodynamics of Transitions. J Am Chem Soc 2015; 137:13603-11. [DOI: 10.1021/jacs.5b08362] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yi Du
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 U.S. Highway 22, Annandale, New Jersey 08801, United States
| | - Bradley Wooler
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 U.S. Highway 22, Annandale, New Jersey 08801, United States
| | - Meghan Nines
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 U.S. Highway 22, Annandale, New Jersey 08801, United States
| | - Pavel Kortunov
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 U.S. Highway 22, Annandale, New Jersey 08801, United States
| | - Charanjit S. Paur
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 U.S. Highway 22, Annandale, New Jersey 08801, United States
| | - John Zengel
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 U.S. Highway 22, Annandale, New Jersey 08801, United States
| | - Simon C. Weston
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 U.S. Highway 22, Annandale, New Jersey 08801, United States
| | - Peter I. Ravikovitch
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 U.S. Highway 22, Annandale, New Jersey 08801, United States
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55
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Mellot-Draznieks C. Computational exploration of metal–organic frameworks: examples of advances in crystal structure predictions and electronic structure tuning. MOLECULAR SIMULATION 2015. [DOI: 10.1080/08927022.2015.1048511] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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56
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Exploiting chemically selective weakness in solids as a route to new porous materials. Nat Chem 2015; 7:381-8. [DOI: 10.1038/nchem.2222] [Citation(s) in RCA: 136] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 02/27/2015] [Indexed: 12/24/2022]
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57
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Wharmby MT, Henke S, Bennett TD, Bajpe SR, Schwedler I, Thompson SP, Gozzo F, Simoncic P, Mellot-Draznieks C, Tao H, Yue Y, Cheetham AK. Extreme Flexibility in a Zeolitic Imidazolate Framework: Porous to Dense Phase Transition in Desolvated ZIF-4. Angew Chem Int Ed Engl 2015; 54:6447-51. [DOI: 10.1002/anie.201410167] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 02/03/2015] [Indexed: 11/10/2022]
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58
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Wharmby MT, Henke S, Bennett TD, Bajpe SR, Schwedler I, Thompson SP, Gozzo F, Simoncic P, Mellot-Draznieks C, Tao H, Yue Y, Cheetham AK. Extreme Flexibility in a Zeolitic Imidazolate Framework: Porous to Dense Phase Transition in Desolvated ZIF-4. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201410167] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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59
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60
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Tharun J, Mathai G, Kathalikkattil AC, Roshan R, Won YS, Cho SJ, Chang JS, Park DW. Exploring the Catalytic Potential of ZIF-90: Solventless and Co-Catalyst-Free Synthesis of Propylene Carbonate from Propylene Oxide and CO2. Chempluschem 2015; 80:715-721. [DOI: 10.1002/cplu.201402395] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Indexed: 11/09/2022]
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61
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Bennett TD, Sotelo J, Tan JC, Moggach SA. Mechanical properties of zeolitic metal–organic frameworks: mechanically flexible topologies and stabilization against structural collapse. CrystEngComm 2015. [DOI: 10.1039/c4ce02145b] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the low elastic modulus of a zeolitic MOF, along with stabilization against structural collapse by filling with solvent.
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Affiliation(s)
- T. D. Bennett
- Department of Materials Science and Metallurgy
- University of Cambridge
- Cambridge, UK
| | - J. Sotelo
- EaStCHEM School of Chemistry
- The University of Edinburgh
- Edinburgh, UK
- EaStCHEM School of Chemistry
- The University of St. Andrews
| | - Jin-Chong Tan
- Department of Engineering Science
- University of Oxford
- Oxford OX1 3PJ, UK
| | - S. A. Moggach
- EaStCHEM School of Chemistry
- The University of Edinburgh
- Edinburgh, UK
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62
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Pimentel BR, Parulkar A, Zhou EK, Brunelli NA, Lively RP. Zeolitic imidazolate frameworks: next-generation materials for energy-efficient gas separations. CHEMSUSCHEM 2014; 7:3202-3240. [PMID: 25363474 DOI: 10.1002/cssc.201402647] [Citation(s) in RCA: 135] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 08/28/2014] [Indexed: 06/04/2023]
Abstract
Industrial separation processes comprise approximately 10% of the global energy demand, driven largely by the utilization of thermal separation methods (e.g., distillation). Significant energy and cost savings can be realized using advanced separation techniques such as membranes and sorbents. One of the major barriers to acceptance of these techniques remains creating materials that are efficient and productive in the presence of aggressive industrial feeds. One promising class of emerging materials is zeolitic imidazolate frameworks (ZIFs), an important thermally and chemically stable subclass of metal organic frameworks (MOFs). The objectives of this paper are (i) to provide a current understanding of the synthetic methods that enable the immense tunability of ZIFs, (ii) to identify areas of success and areas for improvement when ZIFs are used as adsorbents, (iii) to identify areas of success and areas for improvement in ZIF membranes. A review is given of the state-of-the-art in ZIF synthesis procedures and novel ZIF formation pathways as well as their application in energy efficient separations.
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Affiliation(s)
- Brian R Pimentel
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Dr. NW, Atlanta, GA 30332 (USA)
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63
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Burtch NC, Jasuja H, Walton KS. Water Stability and Adsorption in Metal–Organic Frameworks. Chem Rev 2014; 114:10575-612. [DOI: 10.1021/cr5002589] [Citation(s) in RCA: 1621] [Impact Index Per Article: 162.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nicholas C. Burtch
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, Georgia 30332, United States
| | - Himanshu Jasuja
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, Georgia 30332, United States
| | - Krista S. Walton
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, Georgia 30332, United States
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64
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Abstract
Crystalline metal-organic frameworks (MOFs) are porous frameworks comprising an infinite array of metal nodes connected by organic linkers. The number of novel MOF structures reported per year is now in excess of 6000, despite significant increases in the complexity of both component units and molecular networks. Their regularly repeating structures give rise to chemically variable porous architectures, which have been studied extensively due to their sorption and separation potential. More recently, catalytic applications have been proposed that make use of their chemical tunability, while reports of negative linear compressibility and negative thermal expansion have further expanded interest in the field. Amorphous metal-organic frameworks (aMOFs) retain the basic building blocks and connectivity of their crystalline counterparts, though they lack any long-range periodic order. Aperiodic arrangements of atoms result in their X-ray diffraction patterns being dominated by broad "humps" caused by diffuse scattering and thus they are largely indistinguishable from one another. Amorphous MOFs offer many exciting opportunities for practical application, either as novel functional materials themselves or facilitating other processes, though the domain is largely unexplored (total aMOF reported structures amounting to under 30). Specifically, the use of crystalline MOFs to detect harmful guest species before subsequent stress-induced collapse and guest immobilization is of considerable interest, while functional luminescent and optically active glass-like materials may also be prepared in this manner. The ion transporting capacity of crystalline MOFs might be improved during partial structural collapse, while there are possibilities of preparing superstrong glasses and hybrid liquids during thermal amorphization. The tuning of release times of MOF drug delivery vehicles by partial structural collapse may be possible, and aMOFs are often more mechanically robust than crystalline materials, which is of importance for industrial applications. In this Account, we describe the preparation of aMOFs by introduction of disorder into their parent crystalline frameworks through heating, pressure (both hydrostatic and nonhydrostatic), and ball-milling. The main method of characterizing these amorphous materials (analysis of the pair distribution function) is summarized, alongside complementary techniques such as Raman spectroscopy. Detailed investigations into their properties (both chemical and mechanical) are compiled and compared with those of crystalline MOFs, while the impact of the field on the processing techniques used for crystalline MOF powders is also assessed. Crucially, the benefits amorphization may bring to existing proposed MOF applications are detailed, alongside the possibilities and research directions afforded by the combination of the unique properties of the amorphous domain with the versatility of MOF chemistry.
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Affiliation(s)
- Thomas D. Bennett
- Department of Materials Science
and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
| | - Anthony K. Cheetham
- Department of Materials Science
and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
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65
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Yin X, An T, Wang Y, Zhang L. A novel 3D metal organic framework based on an Azolate ligand. Chem Res Chin Univ 2014. [DOI: 10.1007/s40242-014-3501-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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66
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Reversible and selective solvent adsorption in layered metal–organic frameworks by coordination control. J Colloid Interface Sci 2014; 413:175-82. [DOI: 10.1016/j.jcis.2013.09.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 09/06/2013] [Accepted: 09/09/2013] [Indexed: 11/21/2022]
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67
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Fan Z, Wang YY, Xu YY, Su XM, Wu XX, Huo JZ, Ding B, Wang Y, Guo JH. Synthesis and characterization of a novel 3D porous luminescent Ag(I) framework with a multidentate triazole ligand. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2013.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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68
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Schweinefuß ME, Springer S, Baburin IA, Hikov T, Huber K, Leoni S, Wiebcke M. Zeolitic imidazolate framework-71 nanocrystals and a novel SOD-type polymorph: solution mediated phase transformations, phase selection via coordination modulation and a density functional theory derived energy landscape. Dalton Trans 2014; 43:3528-36. [DOI: 10.1039/c3dt52992d] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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69
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Ortiz AU, Freitas AP, Boutin A, Fuchs AH, Coudert FX. What makes zeolitic imidazolate frameworks hydrophobic or hydrophilic? The impact of geometry and functionalization on water adsorption. Phys Chem Chem Phys 2014; 16:9940-9. [DOI: 10.1039/c3cp54292k] [Citation(s) in RCA: 115] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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70
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Mellot-Draznieks C, Kerkeni B. Exploring the interplay between ligand and topology in zeolitic imidazolate frameworks with computational chemistry. MOLECULAR SIMULATION 2013. [DOI: 10.1080/08927022.2013.845298] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Caroline Mellot-Draznieks
- Laboratoire de Chimie des Processus Biologiques, FRE CNRS 3488, Collège de France, 11 Place Marcellin Berthelot, Paris, 75005, France
| | - Boutheïna Kerkeni
- Laboratoire de Physique de la Matière Condensée (LPMC), Département de Physique, Faculté des Sciences de Tunis, Campus Universitaire, Tunis, 2092, Tunisia
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71
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Ferdov S. Low-Density Macroporous Foams Obtained from a Molecular Sieve by Temperature-Induced Amorphization. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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72
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Synthesis, structure and luminescence properties of metal-organic frameworks based on benzo-bis(imidazole). Sci China Chem 2013. [DOI: 10.1007/s11426-013-4985-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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73
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Hughes JT, Sava DF, Nenoff TM, Navrotsky A. Thermochemical Evidence for Strong Iodine Chemisorption by ZIF-8. J Am Chem Soc 2013; 135:16256-9. [DOI: 10.1021/ja406081r] [Citation(s) in RCA: 177] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- James T. Hughes
- Peter
A. Rock Thermochemistry Laboratory, NEAT ORU, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Dorina F. Sava
- Nanoscale
Sciences Department, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Tina M. Nenoff
- Nanoscale
Sciences Department, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Alexandra Navrotsky
- Peter
A. Rock Thermochemistry Laboratory, NEAT ORU, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
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74
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Hegde VI, Tan JC, Waghmare UV, Cheetham AK. Stacking Faults and Mechanical Behavior beyond the Elastic Limit of an Imidazole-Based Metal Organic Framework: ZIF-8. J Phys Chem Lett 2013; 4:3377-3381. [PMID: 26705580 DOI: 10.1021/jz4016734] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We determine the nonlinear mechanical behavior of a prototypical zeolitic imidazolate framework (ZIF-8) along two modes of mechanical failure in response to tensile and shear forces using first-principles simulations. Our generalized stacking fault energy surface reveals an intrinsic stacking fault of surprisingly low energy comparable to that in copper, though the energy barrier associated with its formation is much higher. The lack of vibrational spectroscopic evidence for such faults in experiments can be explained with the structural instability of the barrier state to form a denser and disordered state of ZIF-8 seen in our analysis, that is, large shear leads to its amorphization rather than formation of faults.
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Affiliation(s)
- Vinay I Hegde
- Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560 064, India
| | - Jin-Chong Tan
- Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, United Kingdom
| | - Umesh V Waghmare
- Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560 064, India
| | - Anthony K Cheetham
- Department of Materials Science and Metallurgy, University of Cambridge , Pembroke Street, Cambridge CB2 3QZ, United Kingdom
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75
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Ferdov S. Low-Density Macroporous Foams Obtained from a Molecular Sieve by Temperature-Induced Amorphization. Angew Chem Int Ed Engl 2013; 52:12135-8. [DOI: 10.1002/anie.201305335] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 09/03/2013] [Indexed: 11/10/2022]
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76
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Bhunia MK, Hughes JT, Fettinger JC, Navrotsky A. Thermochemistry of paddle wheel MOFs: Cu-HKUST-1 and Zn-HKUST-1. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:8140-8145. [PMID: 23724924 DOI: 10.1021/la4012839] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Metal-organic framework (MOF) porosity relies upon robust metal-organic bonds to retain structural rigidity upon solvent removal. Both the as-synthesized and activated Cu and Zn polymorphs of HKUST-1 were studied by room temperature acid solution calorimetry. Their enthalpies of formation from dense assemblages (metal oxide (ZnO or CuO), trimesic acid (TMA), and N,N-dimethylformamide (DMF)) were calculated from the calorimetric data. The enthalpy of formation (ΔHf) of the as-synthesized Cu-HKUST-H2O ([Cu3TMA2·3H2O]·5DMF) is -52.70 ± 0.34 kJ per mole of Cu. The ΔHf for Zn-HKUST-DMF ([Zn3TMA2·3DMF]·2DMF) is -54.22 ± 0.57 kJ per mole of Zn. The desolvated Cu-HKUST-dg [Cu3TMA2] has a ΔHf of 16.66 ± 0.51 kJ/mol per mole Cu. The ΔHf for Zn-HKUST-amorph [Zn3TMA2·2DMF] is -3.57 ± 0.21 kJ per mole of Zn. Solvent stabilizes the Cu-HKUST-H2O by -69.4 kJ per mole of Cu and Zn-HKUST-DMF by at least -50.7 kJ per mole of Zn. Such strong chemisorption of solvent is similar in magnitude to the strongly exothermic binding at low coverage for chemisorbed H2O on transition metal oxide nanoparticle surfaces. The strongly exothermic solvent-framework interaction suggests that solvent can play a critical role in obtaining a specific secondary building unit (SBU) topology.
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Affiliation(s)
- Manas K Bhunia
- Peter A. Rock Thermochemistry Laboratory and NEAT ORU, University of California, Davis, One Shields Ave., Davis, California 95616, USA
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77
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Ortiz AU, Boutin A, Fuchs AH, Coudert FX. Investigating the Pressure-Induced Amorphization of Zeolitic Imidazolate Framework ZIF-8: Mechanical Instability Due to Shear Mode Softening. J Phys Chem Lett 2013; 4:1861-5. [PMID: 26283122 DOI: 10.1021/jz400880p] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We provide the first molecular dynamics study of the mechanical instability that is the cause of pressure-induced amorphization of zeolitic imidazolate framework ZIF-8. By measuring the elastic constants of ZIF-8 up to the amorphization pressure, we show that the crystal-to-amorphous transition is triggered by the mechanical instability of ZIF-8 under compression, due to shear mode softening of the material. No similar softening was observed under temperature increase, explaining the absence of temperature-induced amorphization in ZIF-8. We also demonstrate the large impact of the presence of adsorbate in the pores on the mechanical stability and compressibility of the framework, increasing its shear stability. This first molecular dynamics study of ZIF mechanical properties under variations of pressure, temperature, and pore filling opens the way to a more comprehensive understanding of their mechanical stability, structural transitions, and amorphization.
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Affiliation(s)
- Aurélie U Ortiz
- †CNRS and Chimie ParisTech, 11 rue Pierre et Marie Curie, 75005 Paris, France
| | - Anne Boutin
- ‡Département de Chimie, École Normale Supérieure, CNRS-ENS-UPMC, 24 rue Lhomond, 75005 Paris, France
| | - Alain H Fuchs
- †CNRS and Chimie ParisTech, 11 rue Pierre et Marie Curie, 75005 Paris, France
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78
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Galvelis R, Slater B, Chaudret R, Creton B, Nieto-Draghi C, Mellot-Draznieks C. Impact of functionalized linkers on the energy landscape of ZIFs. CrystEngComm 2013. [DOI: 10.1039/c3ce41103f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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